When JD tells you they don't make your parts anymore or they say they're discontinued give us a call because we have them or we find them for you. We Carry new and used JD Parts for 440's 540's and 640. We have a exchange program so that we can keep you going on these older model skidder for a long time to come. Give us a call today we would like to earn your business. We ship all over the US.